Last Sunday, Discovery’s latest seven-part series North America debuted to 3.4 million viewers, making it the night’s second-highest rated cable show behind Game of Thrones). If it’s battles you want to see, narrator Tom Selleck talks you through a few in the next hour, “Learn Young or Die” (May 26, 9 p.m. ET), including one between an OCD woodpecker and a hungry squirrel. Watch it below.